Calculate temperature drop in steel pipe of district heating system (where water is a heat carrier) that is a result of heat losses through pipe wall and insulation using Minenergo Order 325 as a basis for values of heating flux.
Since Minenergo Order 325 is used as the basis for values of heating flux the calculated temperature drop may be considered as a normative temperature drop. If the actual (somehow measured) temperature drop is more than this normative temperature drop they may consider such difference to be due to extra-normative heat losses. The presence of the latter requires appropriate maintenance activities.
m325dropt( temperature = 130, pressure = mpa_kgf(6), consumption = 250, d = 700, len = 1, year = 1986, insulation = 0, laying = "underground", beta = FALSE, exp5k = TRUE )
temperature of heat carrier (water) inside the pipe measured at the
entrance of pipe, [°C]. Type:
of heat carrier (water) inside the pipe, [MPa]. Type:
amount of heat carrier (water) that is transferred by pipe during a period,
internal diameter of pipe, [mm]. Type:
length of pipe, [m]. Type:
year when the pipe is put in operation after laying or total overhaul.
insulation that covers the exterior of pipe:
foamed polyurethane or analogue
type of pipe laying depicting the position of pipe in space:
should they consider additional heat losses of fittings?
pipe regime flag: is pipe operated more that 5000 hours per year?
normative temperature drop at the outlet of pipe, [°C].